Granted Patent
Utility
US 5,993,154 · App. 08/975,823
Welded rotor of a turbo-engine
Inventors:
Wilhelm Endres, Fritz Schaub
Patented Case
View Patent ↗
Granted: Nov 30, 1999
Filed: Nov 21, 1997
Inventors
Wilhelm Endres
Fritz Schaub
Assignee (at issue)
Asea Brown Boveri, S.A.
This patent predates the USPTO's electronic file wrapper — prosecution documents from this era exist only in the Patent Office's paper records. A certified copy of the file history can be ordered from the USPTO's paper archives.